Improvement in dredging apparatus



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J. GRANT. DREDGING APPARATUS. Pate Nn. 180,023. mainly 1a, 1876.

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UNITED STATES I' PATENT @ertoe` JOHN GRANT, OF MOBILE, ALABAMA'.

IMPROVEMENT IN vDREDGING APPARATUS.

Specification forining part of Letters Patent No. 180,023, dated July 18, 11576; application filed June 2a, 1876.

the reiuofal of bars or shoals in running streams by the process of washing,r or scourine` the bottom by the force'of the natural eurrent, by usinga tloating hull or vessel, A, supporting' and carrying' a system or series ot' vertically-adjustable piles, IB B, pointed at their 'lower ends, to which are attached inclined and vertical detlecting'qilates C C, and curved raking-teeth D l), as illustrated inthe accom` pany dra\vil'lgs- Fig-nrc l being an elevation of the Llp-stream side; Fig. 2, a plan View; Fig. 3, an end elevation and Figs. 4 and 5, elevations showing' lower ends ot' piles, B B, with inclined and vertical dellecting-plates U O, and curved rakv ing-teeth D D attached.

It is not deemed necessary to show the mechanism by which the piles B Bv are vertically adjusted, as that constitutes no part of my invention, and may be accomplished by hand or other power with well-known devices.

When the vessel A is placed over' the bar or shoal, with the-points ofthe piles B B and lraking-teeth D D in contact -with the bar or shoal, the current will be deflected by the` inclined'plates C C under and 'between the' vanced end ot' the vessel, to retard its progress until the required direction is obtained.

A steam tug-boat will be in attendance to assist when necessary. l

I claim as my invention-y 1. The dredging apparatus described, consist-ing' ofthe hull A, and verticallyadjnsta` ble piles B B, carrying dellecting-plates C O, and teeth D D, for the purpose ot' dredgingl by the natural'force ot' the current, substantially as speciljed. l

2. Theinclined and vertical detlecting-plates combined, substantially as and for the purpose described. l

3. The curved raking-teeth, in combination with the dvtiecting-plates, and vertically-adjustable piles, for the purpose set forth.

' JOHN GRANT.

Witnesses:

J. T. MAYBURY, C. G. KAUFFMAN. 

